Knapp announced her pregnancy at an industry event in mid-February -- five months after she and the "Lincoln Lawyer" actor officially ended their on-and-off relationship. (Phillippe was dating Amanda Seyfried at the time. They have since split.)

Though Phillippe has not confirmed his paternity -- as of July 25, a source told Us Weekly he had not taken a DNA test -- he's found support from his ex-wife Reese Witherspoon, 35, with whom he has two children: Ava, 11, and Deacon, 7.